Elvis' daughter, Lisa Marie Presley, took her 8-year-old twin daughters, Harper and Finley Lockwood, and her 24-year-old son, Benjamin Keough, to Graceland -- the former home of Elvis -- to pay tribute to the late singer at a candlelight vigil with fans. Lisa Marie, 49, wore a crimson satin dress, while her twins were dressed in similar white and pink dresses. Her son wore a black blazer and jeans, along with a tan shirt and boots.